Arer you doing Dish or Directv or KU/FTA? Dish and Directv have a skew adjustment on the back of the dish. Loosen the two bolts and set to your skew adjustment. If you're doing a KU/FTA, you need to skew the lnb instead of the dish.
Good work ain't cheap, and cheap work ain't good!
This is CABL.com posting #109566. Tiny Link: cabl.co/mCFm